Scotland team doctor James Robson said the operation was to stabilise a fracture to Lamont's fibula.

He is being treated at Edinburgh Royal Infirmary, with a further bulletin on his injury set to be issued on Tuesday.

"Rory is under the care of the orthopaedic surgeons at Edinburgh Royal Infirmary," said Robson. "He was undergoing surgery this lunchtime to stabilise a fracture to his fibula. We will issue a further bulletin tomorrow following this surgery."

Glasgow back Lamont, 29, was replaced after 30 minutes. He had landed awkwardly after contesting a restart and required lengthy treatment on the pitch.

Scotland lost the game 23-17, their third successive defeat of a Six Nations campaign that will conclude with difficult away fixtures against Ireland and Italy next month.

Lamont was not the only player hurt during a tough encounter against Les Bleus.

His brother Sean suffered an abrasion to his right eye, centre Graeme Morrison will undergo further assessment on a knee injury, fly-half Greig Laidlaw suffered a suspected concussion, while Laidlaw's half-back partner Mike Blair was left nursing a dead leg.